Chaga (Inonotus obliquus)
Birch-tree fungus from Northern climates, extensive traditional use in Siberian and Northern European folk medicine; modern clinical evidence is essentially absent.
Why
Chaga (Inonotus obliquus) is a parasitic fungus growing on birch trees in cold-temperate climates (Russia, Scandinavia, Northern North America, Korea). Traditional use in Siberian and Northern European folk medicine for digestive complaints, fatigue, and various inflammatory conditions. Modern clinical-trial evidence in humans is essentially absent, most published work is in vitro or animal studies. Inclusion is for honest reference given growing consumer interest.
How it works
Polysaccharides (β-glucans), triterpenoids (inotodiol, betulinic acid from the birch host), and melanin-pigment content provide antioxidant and immunomodulatory effects in preclinical models. Mechanism of action in humans is not well characterised.
Expected onset · Not characterised in modern clinical literature
How to take
Dosage
Dual-extract powder: 1–4 g/day. Capsules: 500 mg twice daily.
Timing
Once or twice daily
On the label
Dual-extract (hot water + ethanol) from wild-harvested chaga fruiting body. Mycelium-on-grain products are not equivalent. Sustainability is a concern with wild harvest.
Ideal for
Adults exploring functional mushroom options with awareness that human clinical evidence is largely absent.
Safety
Evidence
Preclinical evidence is substantial; human RCT evidence is essentially absent. Kikuchi 2014 case report of oxalate nephropathy raises the principal safety concern for chronic high-dose use. Preliminary, RCTs exist in non-tier-1 journals but are small or short-duration. No Cochrane review, EMA monograph or EFSA-authorised claim covers the indication.
Preliminary, RCTs exist in non-tier-1 journals but are small or short-duration. No Cochrane review, EMA monograph or EFSA-authorised claim covers the indication.
Where to get it
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